cpp_tutorial

C++
int temp;
temp = x; /* save the value at address x */
x = y; /* put y into x */
y = temp; /* put x into y */
}
return;
When the above code is compiled and executed, it produces the following result:
Before swap, value of a :100
Before swap, value of b :200
After swap, value of a :200
After swap, value of b :100
Reference as Return Value
A C++ program can be made easier to read and maintain by using references
rather than pointers. A C++ function can return a reference in a similar way as it
returns a pointer.
When a function returns a reference, it returns an implicit pointer to its return
value. This way, a function can be used on the left side of an assignment
statement. For example, consider this simple program:
#include
#include
using namespace std;
double vals[] = {10.1, 12.6, 33.1, 24.1, 50.0};
double& setValues( int i )
{
return vals[i]; // return a reference to the ith element
}
// main function to call above defined function.
int main ()
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